JP3155434B2 - Movable sinker drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving device for a movable sinker in a flat knitting machine which reciprocates a movable sinker disposed on a needle bed by following the movement of a corresponding knitting needle.

[Prior art]

[0002] In a flat knitting machine in which each knitting needle is reciprocated by an actuator such as a linear motor, a plurality of movable sinkers are provided to prevent the stitch from moving forward with the knitting needle due to the reciprocating movement of the knitting needle, particularly the advance. Each of the movable sinkers is moved by the driving device in accordance with the reciprocating movement of the corresponding knitting needle between the holding position for holding the knitted fabric and the release position for releasing the knitted fabric. In the present invention, moving the knitting needle in a direction protruding from the knitting fabric position is referred to as forward movement, and moving to the side of the knitting fabric position is referred to as retreating.

[0003] As one of the driving devices of this kind of movable sinker, a sinker driving means arranged to be able to move forward and backward on a needle bed so as to displace the movable sinker between a holding position and a release position, and a knitting needle are reciprocated. Connecting means for detachably connecting the sinker driving means to the needle moving means so as to move the sinker driving means in accordance with the movement of the needle moving means, ie, non-fixedly connecting, and restricting the forward and backward positions of the sinker driving means. There is an apparatus including a forward position stopper and a backward position stopper (Japanese Patent Laid-Open No. 6-10 / 1990).
247 public relations).

However, in the above-described driving device, the movable sinker is merely displaced to the holding position when the knitting needle is advanced, so that the knitting needle is at a position slightly advanced after forming the stitch or after the formation of the stitch, that is, in a standby state. When retracted to the position, the knitted fabric is not pressed by the movable sinker, and as a result, during the formation of the second time, it is not possible to knock over, or the previous loop, that is, the old loop is lifted when the knitting needle is waiting, The knitted fabric rises. Such a phenomenon occurs more frequently as the knitting pattern becomes more complicated, such as a pattern with large undulations or a case where knitting is performed locally.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to displace the movable sinker to the holding position even at the time of forming the knitting or waiting for the knitting needle.

[0006]

A drive device for a movable sinker according to the present invention comprises a plurality of knitting needles arranged on a needle bed so as to be able to move forward and backward, a holding position for holding the knitted fabric, and a release position for releasing the knitted fabric. The present invention is applied to a flat knitting machine including a plurality of movable sinkers displaceably arranged on a needle bed and needle moving means for reciprocating a knitting needle.

A driving apparatus for a movable sinker according to the present invention is provided in such a manner that the movable sinker is displaced to a holding position and a releasing position so as to be able to move forward and backward on the needle bed, and to correspond to the movement of the needle moving means. Connecting means for detachably connecting the sinker driving means to the needle moving means so as to move the sinker driving means, i.e., non-fixedly connecting to the needle moving means, and a forward position stopper portion and a retreat position stopper portion for limiting the forward position and the retreat position of the sinker driving device. And an elastic body that applies a forward force to the sinker driving means.

The retracting position stopper is formed at a position for preventing the sinker driving means from retreating when the knitting needle has retreated a predetermined distance from the most advanced position, and the connecting means is such that the sinker driving means abuts the retracting position stopper. Until the knitting needle retreats to the position forming the stitch from the time of contact, the connection of the sinker driving means to the needle moving means is released, and the spring force of the elastic body is applied to the sinker driving means and the needle moving means by the connecting means. Less than the connecting force of

When the knitting needle approaches the retreat position, the connecting means releases the sinker driving means from the needle moving means, and the sinker driving means advances by the elastic force of the elastic body to maintain the movable sinker at the holding position. As a result, the knitted fabric is held down by the movable sinker at the time of forming the stitches and at the standby position, and the previous loop, that is, the old loop, is maintained in a state in which lifting and the like are prevented.

When the knitting needle moves forward, the sinker driving means maintains the movable sinker in the holding position by the advancing force of the needle moving means and the spring force of the elastic body. Is prevented from rising.

When the knitting needle is retracted, the movable sinker is maintained at the release position after the sinker driving means comes into contact with the retracting position stopper and until the connecting means releases the sinker driving means from the needle moving means. It is maintained in its release position and releases the knitted fabric. However, when the connecting means releases the sinker driving means from the needle moving means, the movable sinker is returned to and maintained at the holding position by the spring force of the elastic body, so that the knitted fabric is pressed by the movable sinker, and the old loop is lifted. Is prevented.

According to the present invention, as described above, the movable sinker is displaced to the holding position for holding the knitted fabric even at the time of forming the stitches or at the time of waiting for the knitting needles. It is possible to prevent the stitches from missing when the knitting needles are on standby.

The effect of the present invention is that the forward force is applied to the sinker driving means by an elastic body having a spring force smaller than the coupling force between the sinker driving means and the needle moving means by the connecting means, and the knitting needle is moved to the retreat position stopper portion. It is formed at a position where the sinker driving means is prevented from retreating when retracted a certain distance from the most advanced position, and the connection between the needle moving means and the sinker driving means by the connecting means is started from the position at which the sinker driving means abuts the retracting position stopper. This is achieved by allowing the knitting needle to be released before retreating to the position where the stitch is formed.

The forward position stopper may be formed at a position where the sinker driving means displaces the movable sinker to a holding position when the sinker driving means is in contact with the stopper.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS.
A plurality of knitting needles 14 arranged on the needle bed 12 so as to be able to move forward and backward, a holding position A for holding the knitted fabric 16 and a knitted fabric 16
The present invention is applied to a flat knitting machine including a plurality of movable sinkers 18 displaceably disposed on the needle bed 12 so as to be displaceable to a release position B for releasing the needle and a needle moving means for reciprocating the knitting needles, that is, a plurality of needle moving mechanisms 20. .

Although only one needle bed 12 is shown in the drawing, in practice, a pair of needle beds 12 are arranged in a chevron at an interval so as to form a mouth portion of a flat knitting machine. Have been. Each needle bed 12 extends in the width direction of the knitted fabric 16 (in FIGS. 1 and 2, a direction perpendicular to the paper surface). However, the invention is also applicable to flat knitting machines with one needle bed.

The needle bed 12 is supported on a frame of a flat knitting machine so as to be movable in a longitudinal direction thereof (in FIGS. 1 and 2, a direction perpendicular to the plane of the drawing), and is driven by a needle bed driving mechanism (not shown). Are relatively moved in the longitudinal direction.
The knitting needles 14, the movable sinker 18 and the needle moving mechanism 20 arranged on the same needle bed 12 are arranged in a one-to-one correspondence.

The knitting needles 14 are sequentially arranged on the needle bed 12 in the longitudinal direction of the needle bed 12 so as to extend in the width direction of the needle bed 12, and are operated by an actuator such as a linear motor provided for each knitting needle. The knitting needle 14 is reciprocated in the longitudinal direction through a needle moving mechanism 20 in a predetermined needle moving pattern.

In a cam type flat knitting machine in which a knitting needle is reciprocated by a cam, the needle movement pattern is represented by a vertical axis representing the amount of movement of the knitting needle, as in a cam pattern, a cam diagram, and the like. The movement amount of the yarn feeder, a combination thereof, and the like are represented as a diagram on the horizontal axis. FIG. 4 shows an example of the needle movement pattern.

Each movable sinker 18 has a holding portion 18a for holding the knitted fabric 16, and a fitting portion 1 fitted to the driving device 10.
8b to form a U-shape.
Is supported by the needle bed 12 so as to be pivotable by a pivot pin 22 extending in the width direction of the needle bed. 1 shows a state where the movable sinker 18 is displaced to the holding position A by a dotted line, FIG. 2 shows a solid line, and FIG. 1 shows a state where the movable sinker 18 is displaced to a release position B by a dotted line. FIG. 2 is shown by a solid line.

Each needle moving mechanism 20 includes an elongated plate-shaped moving member 24 that is reciprocated in the longitudinal direction of the knitting needle 14 by an actuator such as a linear motor, a connecting jack 26 that connects the moving member to the knitting needle 14, Is provided. The moving member 24 and the connection jack 26 are arranged on the needle bed 12 so as to be able to reciprocate in the moving direction of the knitting needle 14.

The driving device 10 includes an elongated sinker driving member 30 which can be moved forward and backward on the needle bed 12 so as to selectively displace the movable sinker 18 to the holding position A and the releasing position B. A connecting mechanism 32 for detachably connecting the sinker driving member 30 to the needle moving mechanism 20 so as to move the sinker driving member 30 in accordance with the movement;
The movable sinker 18 is provided with a forward position stopper 34 for limiting the forward position, a retract position stopper 36 for limiting the retracted position of the sinker driving member 30, and an elastic body 38 for applying a forward force to the sinker driving member 30. .

The sinker driving member 30 is disposed on the needle bed 12 so as to be able to reciprocate in the longitudinal direction by the upper and lower guides 40 and 42 disposed on the needle bed 12, and the fitting portion 18b of the movable sinker 18 is provided. It has a recess 44 fitted at the tip. When the sinker driving member 30 is advanced to a predetermined position, the sinker driving member 30 abuts on the advancing position stopper 46 of the stopper 34 at the abutting portion 30a, and when the sinker driving member 30 is retracted to the predetermined position, the retracting position stopper 48 on the stopper 36 at the abutting portion 30b. Abut.

In the illustrated example, the connecting mechanism 32 includes a first elongated frictional engagement member 50 in a rack shape and a second frictional engagement member 52 bent in an L-shape. The first frictional engagement member 50 is formed of a chevron portion extending in the width direction provided at a distance from the connection jack 26 in the longitudinal direction. The second friction engagement member 52 is formed of an L-shaped leaf spring, and the second friction engagement member 52 is so formed as to be releasably engaged with the engagement portion of the first friction engagement member 50. Is fixed to the sinker driving member 30 by screwing, tacking, welding, or the like.

As shown in FIG. 3B, the second frictional engagement member 52 includes a connecting jack 26 and a sinker driving member 30.
The spring force is previously strengthened so as to connect with a predetermined connecting force. The connection jack 26 has a cutout 54 through which a part of the second frictional engagement member 52 can enter and exit due to elastic deformation of the second frictional engagement member 52. Thereby, when a slip occurs in the frictional engagement portion due to the relative movement of the first and second frictional engagement members 50 and 52, the first piece of the second frictional engagement member 52 is moved to the first position. 1 frictional engagement member 50
The second frictional engagement member 52
Part enters and exits the notch 54.

The stoppers 34, 36 are supported by the needle bed 12. The elastic body 38 is a leaf spring attached to the advance position stopper 34. The elastic body 38 is engaged with a notch 56 formed in the sinker driving member 30, thereby applying a forward force to the sinker driving member 30. The spring force of the elastic body 38 is smaller than the connecting force between the sinker driving member 30 and the needle moving mechanism 20 by the connecting mechanism 32, that is, the engaging force of the first and second frictional engaging members 50 and 52 of the connecting mechanism 32.

When the sinker driving member 30 is in contact with the forward position stopper 34, the sinker driving member 3
0 is located at a position that maintains the sinker 18 at the holding position A. On the other hand, the retreat position stopper 36 is arranged at a position for preventing the sinker drive mechanism 30 from retreating when the knitting needle 14 has retreated to a certain distance from the most advanced positions 105 to 106 in FIG. 4, for example, to the position 107 in FIG. ing.

When the knitting needle 14 has moved forward from the standby positions 102 to 103 in FIG. 4 by a predetermined distance, for example, to the position 104, the connecting mechanism 32 connects the sinker driving member 30 to the needle moving mechanism 20. Is located in the position.

When the knitting needle 14 is retracted, the sinker driving member 30 contacts the retreating position stopper 36 and the knitting needle 14 moves back to the position where the stitch is formed. When retracted to the position 100 in FIG. 4, the connection of the sinker drive member 30 to the connection mechanism 32, that is, the engagement of the first and second friction engagement members 50 and 52 is released.

An elastic body for applying a force to advance the sinker driving member 30 with respect to the needle moving mechanism 20 to the sinker driving member 30 is disposed at the rear end of the sinker driving member 30 like a driving device 60 shown in FIG. Compression coil spring 62
For example, a compression coil spring disposed between the sinker driving member 30 and another member, or a tension coil spring disposed between the sinker driving member 30 and another member may be used. .

The operation of the driving device 10 will be described with reference to FIGS. In FIGS. 5 and 6,
The spring force of the elastic body 38 or 62 is indicated by reference numeral 64. 5 and 6, the reference numerals of the members are the same as those in FIG.
(A) and (E) and FIGS. 6 (A) and (E) are shown as representatives.

As shown in FIG. 5A, when the knitting needle 14 is located at the last retreat position 101 for forming the stitch from the position 100 in FIG. 4, the engagement of the friction engagement members 50 and 52 of the connecting mechanism 32 is performed. The combination has been released, and the sinker driving member 30 has been released from the needle moving mechanism 20. For this reason,
The sinker driving member 30 causes the contact portion 30a to contact the forward position stopper 46 by the spring force 64 of the elastic body 38 or 62, and the movable sinker 18 is displaced to the holding position A. As a result, the knitted fabric 16 becomes a movable sinker 18.
As a result, the old loop 16a is maintained in a state in which it is prevented from lifting up.

As shown in FIG. 5B, the knitting needle 14 is moved from the last retreat position 101 to the standby positions 102 to 10 in FIG.
3, the connecting jack 26 of the needle moving mechanism 20 is advanced while moving forward to the position 104.
The engagement of the sinker drive member 30 is not performed until the sinker drive member 30 is brought into contact with the forward-position stopper portion 46 by the spring force 64.
The movable sinker 18 maintains the holding position.

As shown in FIG. 5C, when the knitting needle 14 advances to the position 104 in FIG.
0, 52 are engaged. Thereby, the sinker driving member 3
Numeral 0 is connected to the needle moving mechanism 20 by friction engagement members 50 and 52, and receives the forward force of the needle moving mechanism 20. But,
The sinker drive member 30 maintains the movable sinker 18 at the holding position A because it has already contacted the forward position stopper 46.

As shown in FIG. 5D, while the knitting needle 14 moves from the position 104 to the position 105 in FIG.
Since the sinker drive member 30 is in contact with the advance position stopper 46, as the knitting needle 14 advances, an overload exceeding the coupling force, that is, the coupling force of the friction engagement members 50, 52 is applied to the friction engagement members 50, 52. Act on.

As a result, slippage occurs in the friction engagement members 50 and 52, and the sinker driving member 30 stops moving forward despite the needle moving mechanism 20 and the knitting needle 14 moving forward. However, since the sinker driving member 30 receives the forward force due to the sliding of the friction engagement members 50 and 52, the sinker driving member 30 is maintained in a state of contacting the forward position stopper 46, and maintains the movable sinker 18 at the holding position A.

When the movable sinker 18 presses the knitted fabric 16, an excessive load exceeding the coupling force of the friction engagement members 50 and 52 acts on the friction engagement members 50 and 52 when the friction engagement members 50 and 52 slide. Also occurs,
The needle moving mechanism 20 and the knitting needle 14 move forward, but the sinker driving member 30 maintains the movable sinker 18 at the holding position A.

As shown in FIG. 5E, while the knitting needle 14 remains at the most advanced positions 105 to 106 in FIG.
Since the friction engagement members 50 and 52 are engaged, the sinker driving member 30 is maintained in a state of contacting the forward position stopper 46, and the movable sinker 18 is maintained at the holding position A.

As shown in FIG. 6A, while the knitting needle 14 is retracted from the position 106 to the position 107 in FIG.
Since the sinker driving member 30 is connected to the needle moving mechanism 20 by the friction engagement members 50 and 52, the sinker driving member 30 is retracted together with the knitting needle 14 against the spring force 64, and the movable sinker 18 is released as shown in FIG. Displaced toward position B.

As shown in FIG. 6B, when the needle 14 retreats to the position 107 in FIG. 4, the contact portion 30b of the sinker driving member 30 contacts the retreat position stopper portion 48, and the movable sinker 18 moves to the release position. B. Thereby, the knitted fabric 16 is released from the movable sinker 18.

As shown in FIG. 6 (C), while the knitting needle 14 moves from the position 107 in FIG. 4 to the position 100 via the positions 108 and 109, the sinker driving member 30 comes into contact with the retreating position stopper portion 48. Because there is a knitting needle 1
4 retreats, an excessive load exceeding the engagement force of the friction engagement members 50 and 52, that is, the coupling force, is applied to the friction engagement members 5 and 52.
Act on 0,52. Thereby, the friction engagement members 50,
52, the needle moving mechanism 20 and the knitting needle 14 retreat, but the sinker driving member 3
0 stops retreat. However, the sinker driving member 30
Receives the retreating force due to the sliding of the frictional engagement members 50 and 52, and is maintained in contact with the retreating position stopper 48, and the movable sinker 18 is maintained at the release position B.

As shown in FIG. 6D, when the knitting needle 14 is retracted to the position 100 in FIG.
The engagement of 0 and 52 is released, the sinker driving member 30 is released from the needle moving mechanism 20 by the connecting mechanism 32, and the retreating force of the needle moving mechanism 20 does not act on the sinker driving member 30. Thereby, as shown in FIG. 6E, the sinker driving member 30 receives the forward force by the spring force 64 and abuts on the forward position stopper 46 to maintain the movable sinker 18 at the holding position A. As a result, the knitted fabric 16 is held down by the movable sinker 18, and the old loop 16a is maintained in a state where it is prevented from rising.

Then, after the knitting needle 14 has retreated to the last retreat position 101 in FIG.
Advance to 02. Meanwhile, the sinker driving member 30
The movable sinker 18 is maintained at the holding position by the spring force 64.

Referring to FIG. 8, the connecting mechanism 72 of the driving device 70 includes a first frictional engagement member 74 pivotally supported by the needle bed 12 and a second frictional member fixed to the connection jack 26. And an engagement member 76.

The first frictional engagement member 74 has an engagement portion 74a that frictionally engages the second frictional engagement member 76 at the distal end.
And a recess 78 formed at the lower end of the sinker driving member 30.
Has a V-shaped shape with a fitting portion 74b having a tip portion received therein, and has an engaging portion 74a and a fitting portion 74b.
The pin 80 is pivotally supported on the needle bed 12 at a connection portion with the pin 80.

The second friction engagement member 76 includes a base 76a fixed to the connecting jack 26, a concave portion 76b connected to one end of the base, a flat portion 76c connected to the concave portion, and an inclined portion connected to the flat portion. 76d.

The needle bed 12 has a guide portion 82 with which the second frictional engagement member 76 abuts.
6 is a concave portion 84 between the guide portion 82 and the main portion of the needle bed 12.
Are located in The connection jack 26 has an elongated slider 88 penetrating a lower guide 86 of the needle bed 12 in the front-rear direction.
It is connected to.

Needle bed 12 through which sinker drive member 30 penetrates
The upper guide and stopper 94 of the sinker driving member 30
Advancing position stopper 46 for restricting the advancing position of the sinker driving member 30 by abutting the abutting portion 30a at the lower end of the sinker; and the abutting portion 30b at the upper end of the sinker driving member 30
And a retracting position stopper 48 for restricting the retracting position of the sinker driving member 30 by contact of the portions. The elastic body 92 is connected to the sinker driving member 30 and the upper guide / stopper 94.

In the driving device 70 shown in FIG. 8, a tension coil spring disposed between the sinker driving member 30 and the stopper 112 as in the driving device 110 shown in FIG. Elastic body 114 for applying a forward moving force to sinker driving member 30
May be used.

In the embodiment shown in FIG. 9, the sinker driving member 30 has its advancing position restricted by the abutting portion 30a abutting against the advancing position stopper 92 of the stopper 112, and the abutting portion 30b of the stopper 112 The retreat position is restricted by contacting the retreat position stopper 94.

The embodiment shown in FIG. 8 and the embodiment shown in FIG. 9 operate almost in the same manner. Therefore, the operation of the embodiment of FIG. 9 will be described with reference to FIG. 4, FIG. 10 and FIG. In FIGS. 10 and 11, reference numerals of members are shown as representatives of FIGS. 10 (A) and 11 (A).

As shown in FIG. 10 (A), when the knitting needle 14 is retracted to the last retreat position 101 for the first stroke in FIG. 4, the second frictional engagement member 76 is brought into the first frictional engagement. The sinker driving member 30 is separated from the needle moving mechanism 20 by being largely separated downward from the member 74. For this reason, the sinker driving member 30 causes the contact portion 30 a to contact the forward position stopper portion 92 by the spring force of the elastic body 114. Thereby, the movable sinker 18 is maintained at the holding position for holding the knitted fabric.

The knitting needle 14 is moved to the last retracted position 10 in FIG.
While moving from 1 to the standby position 102, the knitting needle 14
While the knitting needle 14 moves from the position 103 to the position 104 in FIG. 4, the friction engagement members 74 and 76 are released, and the sinker driving member 30 is 114 abuts against the forward position stopper 92.

As shown in FIG. 10B, when the knitting needle 14 advances to the position 104 in FIG.
The sixth inclined portion 76 d contacts the engagement portion 74 a of the friction engagement member 74. Thereby, the sinker driving member 30 is connected to the needle moving mechanism 20 by the friction engagement members 74 and 76,
It receives the forward force of the needle moving mechanism 20. However, the sinker driving member 30 maintains the movable sinker 18 at the holding position since the sinker driving member 30 has already contacted the forward position stopper portion 92.

When the knitting needle 14 advances further from the position 104 in FIG. 4, the flat portion 76c of the friction engagement member 76 engages with the engagement portion 74a of the friction engagement member 74, and receives the advance force of the needle moving mechanism 20. . However, the sinker driving member 30
Abuts against the forward position stopper 92, a slip occurs between the engagement portion 74a of the friction engagement member 74 and the flat portion 76c of the friction engagement member 76, and the sinker driving member 30 causes the movable sinker 18 to move. Maintain the presser position.

As shown in FIG. 10C, when the knitting needle 14 advances to the most advanced position 105 in FIG. 4, the recess 76b of the frictional engagement member 76 engages with the engagement portion 74a of the frictional engagement portion 74.
Therefore, the sinker driving member 30 is released from the needle moving mechanism 20 and receives only the forward force by the elastic body 114. As a result, the sinker driving member 30 is
The movable sinker 18 is kept in the holding position because the movable sinker 18 is in contact with the forward position stopper 92 due to the forward force of the movable 14.

The knitting needle 14 is moved to the most advanced position 10 in FIG.
While staying at 5 to 106, the engagement of the friction engagement members 74 and 76 is released, and the sinker driving member 30 is released from the needle moving mechanism 20. Therefore, the sinker driving member 30 is in contact with the forward position stopper 92 by the spring force of the elastic body 114, and the movable sinker 18 is maintained at the holding position.

As shown in FIG. 11A, while the knitting needle 14 is retracted from the position 106 in FIG. 4 to the position 107, the engaging portion 74a of the frictional engaging portion 74 is
The frictional engagement member 76 is retracted in a state in which the frictional engagement member 76 is in contact with the boundary between the concave portion 76b and the flat portion 76c, and the sinker driving member 3
0 is connected to the needle moving mechanism 20 by friction engagement members 74 and 76. As a result, the sinker driving member 30 is retracted together with the knitting needle 14 because the needle moving mechanism 20 receives the retreating force, and the movable sinker 18 is displaced toward the release position where the knitted fabric is released.

As shown in FIG. 11B, when the knitting needle 14 retreats to the position 107 in FIG. 4, the contact portion 30b of the sinker driving member 30 contacts the retreat position stopper portion 92 and the movable sinker 18 is released. The displacement to is terminated.
Thereby, the knitted fabric 16 is completely released. At this position 107, the flat portion 76c of the friction engagement member 76 contacts the engagement portion 74a of the friction engagement portion 74.

As shown in FIG. 11C, while the knitting needle 14 moves from the position 107 in FIG. 4 to the position 100 via the positions 108 and 109, the sinker driving member 30 is moved.
Is in contact with the retreat position stopper portion 94, so that the flat portion 7 of the frictional engagement member 76
An excessive load exceeding the coupling force between the engagement portion 6c and the engagement portion 74a of the friction engagement portion 74 acts on the friction engagement members 74 and 76. As a result, slippage occurs between the flat portion 76c of the frictional engagement member 76 and the engagement portion 74a of the frictional engagement portion 74, so that although the needle moving mechanism 20 and the knitting needle 14 are retracted,
The sinker driving member 30 stops retreating. However, since the sinker driving member 30 receives the retreating force due to the sliding of the friction engagement members 74 and 76, the sinker driving member 30 is maintained in a state of being in contact with the retreat position stopper 94, and the movable sinker 18 is maintained at the release position.

As shown in FIG. 11D, when the knitting needle 14 is retracted to the position 100 in FIG.
6 is in contact with the engaging portion 74a of the friction engaging member 74, the engagement of the friction engaging members 74 and 76 is released, and the sinker driving member 30 is released from the needle moving mechanism 20 by the connecting mechanism 72. As a result, the retreating force of the needle moving mechanism 20 does not act on the sinker driving member 30. As a result, the sinker driving member 30 receives the forward force of the elastic body 114 and abuts the forward position stopper 94 to maintain the movable sinker 18 at the holding position. As a result, the knitted fabric is movable sinker 1
8, and the old loop is maintained in a state where lifting is prevented.

Then, after the knitting needle 14 has retreated to the last retreat position 101 in FIG. 4, the standby position 1 in FIG.
Advance to 02.

As described above, the driving devices 10, 60, 70
In both cases 110 and 110, while the knitting needle 14 advances from the position 100 in FIG. 4 via the positions 101 to 104 to the most advanced position 105 and while the knitting needle 14 stays in the most advanced position 105 to 106 in FIG. The driving member 30 is provided with the forward force of the needle moving mechanism 20 or the elastic body 3.
The movable sinker is maintained at the holding position by the spring force 64 of 8, 62, 92 or 114, the knitted fabric is pressed by the movable sinker, and the old loop is prevented from lifting.

On the other hand, when the knitting needle 14 retreats from the position 106 to the position 107 in FIG. 4, the sinker driving member 30 is connected to the needle moving mechanism by the connecting mechanism and receives the retreating force of the needle moving mechanism, and The movable sinker 18 is displaced to the release position until it comes into contact with the retreat position stopper portion 48 against the spring force of the movable sinker 18. Thereby, the holding of the knitted fabric by the movable sinker 18 is released.

Further, the sinker driving member 30 is
The movable sinker 18 is maintained in the release position until 4 moves back from position 107 to position 100 in FIG. When the knitting needle 14 retreats to the position 100 in FIG. 4, the sinker driving member 30 is advanced with respect to the needle moving mechanism by the spring force of the elastic body, displaces the movable sinker 18 to the holding position, and maintains the state. .

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment in which a drive device of the present invention is arranged on a needle bed of a flat knitting machine.

FIG. 2 is a sectional view showing a movable sinker portion of the drive device of FIG.

FIGS. 3A and 3B are diagrams for explaining the operation of the driving device of FIG. 1, and FIG. 3A is a diagram illustrating a moving state of the knitting needle and a left side surface of the driving device when the knitting needle is at a standby position; (B)
FIG. 6 is a diagram showing a left side surface of a portion of the coupling mechanism when the knitting needle is at a most advanced position.

FIG. 4 is a diagram illustrating an example of a needle movement pattern.

FIG. 5 is a view for explaining the operation of the drive device of FIGS. 1 and 7 when the knitting needle advances.

FIG. 6 is a diagram for explaining the operation of the drive device of FIGS. 1 and 7 when the knitting needle is retracted.

FIG. 7 is a sectional view showing another embodiment of the driving device.

8A and 8B are diagrams showing still another embodiment of the driving device, wherein FIG. 8A is a cross-sectional view and FIG. 8B is a diagram showing a frictional engagement member.

FIG. 9 is a view showing still another embodiment of the driving device.

FIG. 10 is a view for explaining the operation of the drive device of FIG. 9 when the knitting needle advances.

FIG. 11 is a diagram for explaining the operation of the driving device of FIG. 9 when the knitting needle is retracted.

[Explanation of symbols]

 10, 60, 70, 110 Drive device 12 Needle bed 14 Knitting needle 16 Knitted fabric 18 Movable sinker 20 Needle drive mechanism 30 Sinker drive member 32, 72 Connecting mechanism 38, 62, 92, 114 Elastic body 46, 92 Advance position stopper portion 48 , 94 Retraction position stopper portions 50, 52, 74, 76 Friction engagement members 30a, 30b Contact portions

Claims (2)

(57) [Claims] 1. A plurality of knitting needles arranged on a needle bed so as to be able to move forward and backward, and a plurality of movable needles arranged on the needle bed so as to be displaceable between a holding position for holding the knitted fabric and a release position for releasing the knitted fabric. In a driving device for a movable sinker in a knitting machine including a sinker and a needle moving unit that reciprocates the knitting needle, the movable sinker is disposed so as to be able to move forward and backward on the needle bed so as to displace the movable sinker between the holding position and the release position. Sinker driving means, connecting means for fixingly connecting the sinker driving means to the needle moving means so as to move the sinker driving means in response to movement of the needle moving means, and advancement of the sinker driving means A stopper having a forward position stopper portion and a backward position stopper portion for limiting a position and a backward position, and applying forward force to the sinker driving means. The retracting position stopper portion is formed at a position for preventing the sinker driving unit from retreating when the knitting needle has retreated a predetermined distance from the most advanced position, and the connecting unit includes the sinker driving unit. Between the time when the means comes into contact with the retreat position stopper and the time when the knitting needle retreats to the position forming the stitch, the connection of the sinker driving means to the needle moving means is released, and the spring of the elastic body is released. The force is smaller than the connecting force between the sinker driving means and the needle moving means by the connecting means,
Drive device for movable sinker. 2. The device according to claim 1, wherein the forward position stopper is formed at a position where the sinker driving means displaces the movable sinker to a holding position when the sinker driving means is in contact with the stopper. The driving device as described.